WO2017207130A1

WO2017207130A1 - Electromagnetic valve device and system

Info

Publication number: WO2017207130A1
Application number: PCT/EP2017/057622
Authority: WO
Inventors: Andrzej Pyza; Marcin Nieweglowski; Michael FEINDLER
Original assignee: Eto Magnetic Gmbh
Priority date: 2016-05-30
Filing date: 2017-03-30
Publication date: 2017-12-07
Also published as: DE102016109865A1; EP3464968B1; US20190264828A1; US11073220B2; CN109477588B; EP3464968A1; CN109477588A

Abstract

The invention relates to an electromagnetic valve device, comprising armature elements (12, 14), which can be moved in an axial direction in response to energization of stationary coil elements (16) in order to actuate a valve slide assembly (28) and which are accommodated together with the coil elements and stationary core elements in an actuator housing (17, 19, 20, 22) preferably as a structural unit and/or module and which assume a pushed-in and/or reacted armature position (Fig. 1) in a deenergized state of the coil elements, wherein, at one axial end, the valve slide assembly (28), which is guided in a valve housing (26), is designed for contacting interaction with the armature elements (14) in a manner not permitting tensile loading and is designed in such a way that a fluid path from a first fluid connection (P) of the valve housing to a second fluid connection (A) of the valve housing can be opened or blocked in accordance with an axial position of the valve slide assembly, wherein the valve housing (26) has at least one axially fluid-conducting channel section (50) on the inside, in particular at an axial end opposite the armature elements, for interaction with the valve slide assembly (28) guided in the valve housing, which channel section is designed in such a way that, in the axial position of the valve slide assembly corresponding to the pushed-in or retracted armature position, the valve slide assembly blocks the fluid path and, in an axial position of the valve slide assembly moved out of the pushed-in or retracted armature position, the valve slide assembly opens the fluid path via the flow-conducting channel section (50).

Description

Electromagnetic valve device and system

The present invention relates to an electromagnetic Ventilvorrich- device according to the preamble of the skin claim. Furthermore, the present invention relates to a system comprising such an electromagnetic valve device.

Electromagnetic actuators in which an armature unit movable in response to energization of stationary coil means relative to stationary core means drives a valve slide unit and, corresponding to a respective actuator position, effects valve functionality are well known in the art. Not least because of their simple constructive realization, their suitability for large-scale production and their mechanical reliability, generic valve devices are therefore common for a wide variety of applications. Uses associated with switching fluid in a vehicle or automotive context are preferred, however, use is not limited to this technical field.

5 illustrates the prior art in the manner of a schematic longitudinal sectional view of the basic structure of a (largely radially symmetrical about a horizontally extending longitudinal axis realized) valve device according to the preamble. Thus, an actuator module 10 constructed preferably in the form of a module, in the view of FIG. 5 bordered by the dashed line shown on the left, has anchoring means which have an anchor body 12 and an armature tappet 14 firmly seated thereon and reduced in diameter. These anchor means are along the axial direction (ie along the horizontal line of symmetry in Fig. 1) from the retracted or retracted anchor position shown in Fig. 5 by energizing a stationary 5), wherein an electromagnetically generated flux circuit for this armature movement of an armature or yoke portion 18, a shell-side, magnetically conductive housing portion 20 and a left-side front-side cover or yoke portion 22 is closed, so that along the direction of arrow in Fig. 5, the actuator movement takes place during the energization.

This module-type actuator unit 10 cooperates with a valve housing unit 24 forming the valve fluid connections P (as typical pressure connection), A (as working connection) and T (as ventilation connection) (shown symbolically by the right-hand dashed border in FIG. 5), in which the ports P, A and T are formed as openings in a polymeric valve housing 26 elongated along the axial direction. Inside this valve housing 26, a valve spool assembly 28 is guided axially movable, which at a left-side end 30 (end face) abutting from an outer end face of the Ankerstößelabschnitts 14, without the assemblies 14 and 28 are firmly connected. A pressure spring 32 provided in the right-side end region of the valve slide assembly 28 and repelling from an end-side end region (in the region of the pressure port P) biases the valve slide assembly 28 against the anchor means 12, 14 (more precisely: against the end-side end face of the armature tappet portion 14).

In the manner thus constructed and shown schematically in Fig. 5, a 3/2-valve is realized, namely a valve, in which by movement of the anchor means 12, 14 and correspondingly driving the valve spool assembly 28 two positions (alternatively or in development also in the manner of a proportional valve suitable intermediate positions) can be set or controlled, and wherein the technology shown in the prior art 5 represents a so-called normally open state, namely an opened fluid channel between the end face of the valve housing provided (first) fluid port P and the adjacent shell side provided on the valve housing 26 (second) fluid end as working port A; the curved arrow 34 symbolizes this open in the illustrated energized state of the coil means 16 fluid path 34th

The valve shown has three fluid ports; In addition to the already discussed and forming the (first) fluid path 34 ports P and A is a third, axially adjacent to the working port (second fluid port) in the direction of the actuator unit 10 provided third fluid port, here as a vent port T, provided by suitable Training or profiling of the valve spool assembly in the operating state of FIG. 5 (energized coil unit, so that fluid path 34 PA open) closes the other fluid path AT. On the other hand, upon energization of the coil means 16 and thus caused legal movement of the anchor means 12, 14 and thus the entrainment of the valve spool assembly 28 to the right against the return action of the compression spring 32, a recess or recess 36 on the shell side of the valve spool assembly positioned so that when closing the first fluid path (arrow direction 34 interrupted) instead a fluid communication between A and T is possible. Accordingly, the technology shown in Fig. 5 is also referred to as normally open (NO) valve training, based on P-A.

While such a technology, shown schematically in FIG. 5, has proven its worth in everyday practice and is used in numerous technical fields of application, it is nevertheless often preferred as well. an electromagnetic valve device not, as in FIG. 5, as normally open (NO) form, it is often advantageous to ensure about a valve-lock state in the event of a power failure or the like, a solenoid valve of the type shown, in particular as the 3rd / 2 valve, closed normally closed (NC = normally closed) to design, such that an electroless (and as defined by engaging spring means) anchor position closes the fluid path PA.

However, with the basic geometry shown in FIG. 5, a normally closed (NC) valve topology can not easily be realized. Rather, this requires a modification of the actuator assembly, in particular, as shown schematically in FIG. 6; It is assumed for the further discussion that the realization according to FIG. 6 is also known in principle. In the further discussion, in particular also for the later description of exemplary embodiments of the invention, the same reference symbols apply to identical or functionally equivalent assemblies or functional elements.

6, the actuator assembly is realized by an anchor body 12 ', which is attracted in response to the energization of the coil means 16 in the direction of a left side core unit 18', wherein between the anchor body 12 'and the stationary core 18' provided compression spring 32 'in the energization and thus effected (to the left according to the arrow in Fig. 6 shown) movement of the armature unit 12' is compressed.

A valve spool assembly 40 is seated with its left-side end portion 48 at a connection point 42 (eg by gluing or another fixed connection technique) on an end face of the anchor body 12 shown on the right-hand side of FIG At- kers the valve spool assembly 40 is taken along to the left. The de-energized state is shown in FIG. 6; while a fluid path 44 AT is open, a fluid communication PA is blocked, symbolically shown by the reference numeral 46. The energization of the coil means 16 and the subsequent movement of the armature 12 'in the left direction opens the fluid path PA at the position 46, while at the same time the fluid path AT (arrow 44) is blocked by the right-hand (thickened) end region of the valve spool assembly 40, 42 , While such a technical realization is also widespread and proven, the realization of the actuator assembly for an NC configuration (FIG. 6) in contrast to the NO configuration (FIG. 5) represents a large design distance, so that, in particular, a flexible adaptation or conversion of the solenoid valves from NO to NC or vice versa by way of production is difficult or impossible; each time the Aktorbaugruppen should be changed, in the case of the NC configuration of FIG. 6 is added as an additional problem that the necessary and also on train reliable connection between the anchor means of the valve spool assembly must be fixed, so about a separate connection (Adhesive) operation is required, which also, for example in the case of vibration loads or the like, is susceptible to interference and damage. It is also generally useful or advantageous for magnetic or hysteresis reasons to mechanically decouple the anchor means from the valve slide assembly, in particular if this is realized from magnetically relevant material.

The object of the present invention is therefore to design an electromagnetic valve device according to the preamble of the main claim in such a way that, in particular while largely retaining the actuator realization in an actuator housing with little additional Chen effort for valve housing or valve spool conversion or production change from a suitable for a normally open open operation valve device is made possible on a suitable for a normally closed operation electromagnetic valve device. In particular, a proportion of identical parts is to be increased, and it should further preferably be a cost-effective, automated production possible.

The object is achieved by the electromagnetic valve device having the features of the main claim; advantageous developments of the invention are described in the subclaims.

In accordance with the invention advantageously, the valve housing for cooperation with the valve slide assembly guided therein is provided with at least one axially flow-channel channel portion which is formed so that in the retracted or retracted armature position corresponding axial position of the valve spool assembly - this is inventively not fixed and tensile connected to the anchor means, but is merely acted upon by these thrust - the fluid path is blocked, while, after energizing the coil means and moving out of the anchor means from the retracted or retracted anchor position, via the at least one axially fluid-conducting channel section of the fluid path from the first danschluss (preferably P) from the second fluid port (preferably A) is opened.

This is advantageously realized according to the invention that, structurally simple and virtually unchanged usability of an actuator of the type shown in Fig. 5, only by pressurizing a releasably mounted valve spool an NC functionality is effected, namely the fact that in the de-energized state in the interaction between Valve spool assembly and surrounding portion of the valve housing, the channel section according to the invention is closed and locked according to the fluid path, while an effected by energizing retraction of the armature unit and a corresponding pressure-responsive Mith valve the valve spool assembly opens or exposes at least one channel section so that thereby the fluid flow is enabled ,

In the context of preferred developments of the invention, the flow-conducting channel section is provided in a plurality, more preferably and with a largely radially symmetrical configuration, in particular at the relevant end of the valve housing or the valve slide assembly, such a channel section is arranged in a plurality around the inner circumference of the housing section, so that also with low flow resistance of the fluid path is realized by the sum of the individual channel sections.

It is also advantageous within the scope of preferred developments of the invention to advantageously provide the first fluid connection as a pressure connection, on the face side of the valve housing and thus preferably along the axial direction, while the second fluid connection (possibly further fluid connections) on a lateral housing region, in particular a jacket region, the valve housing are provided. Thus, it is then geometrically possible for the inventive fluid-conducting channel section of the valve housing to lie at least in sections along the axial direction or parallel to it between the first and the second fluid connection (again along the axial direction).

Furthermore, in one embodiment of the electromagnetic valve device, force-storing means act on the valve slide assembly and / or the anchor means in such a way that a return putting force arises in the retracted or withdrawn anchor position; This is done particularly advantageously by configuring the further-forming force-storing means as a compression spring, which additionally advantageously and further education approximately frontally and / or attack in an opposite to the Ankerkitteln axial end portion of the valve spool assembly, in which case it is again advantageous, such a spring at the other end of a corresponding Support section or abutment of the valve housing. Particularly preferred is the realization of the present invention as a 3/2-valve, either as a switching or proportional valve, for which purpose a further (third) port is preferably provided, which further preferably in a lateral region of the valve housing, adjacent to the second fluid port in the direction of the anchor means. By suitable design in particular of the valve spool assembly, a functionality can be generated in such a way that when the fluid path between the first and the second fluid connection blocking axial position of the valve spool assembly (ie in the de-energized state), the valve spool assembly opens a further fluid path from the second to the additional third fluid path or releases. In contrast, the valve spool assembly would be formed (by appropriate insertion or shaping) so that when energizing and moving the anchor means from the retracted position with the opening of the fluid path between the first and second fluid end of the further fluid path (second to third Fluid connection) is blocked. This functionality can be realized both as a switching, as well as a proportional valve, this i.Ü. also for the possible realization of the invention 2/2-valve, so only with the first and the second fluid connection is possible. The achieved by the present invention largely unchanged geometry in the design of the actuator assembly, which can be configured in the context of preferred embodiments of the invention, in particular as a structural unit or (separately providable and manufacturable) module, now allows in the manner of a system according to the invention, only by replacing or providing one for an NO mode (approximately analogous to the embodiment according to FIG. 5) to create a construction kit, in which then, for changing from NO to NC and vice versa, in each case only one valve assembly consisting of valve housing and guided therein Valve spool assembly to replace or assemble, so that significant benefits are realized especially in a flexible (and largely automated) series production. This advantageous development does not exclude, however, that the present invention, structurally favorable, designed as a coil carrier according to the invention in the coil means integral with the valve housing according to the invention (this would then also apply to the modification in the context of the system), so that on this Way then manufacturing or tooling costs can be reduced.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings; these drawings show in

Fig. 1 is a schematic partial sectional view of the electromagnetic valve device according to a first embodiment of the invention in NC configuration, in which: Figure 1 shows the de-energized closed state; FIG. 2 is a cross-sectional view taken along section line AA in FIG.

1 ; 3 shows a cross-sectional view along the section line B-B in FIG.

1 ;

Fig. 4 is a longitudinal sectional view similar to FIG. 1, but in the energized

State of the coil means and thus in from the inserted or withdrawn anchor position (in the direction pushed forward to the right armature position) for opening the fluid id path P-A; a schematic representation of a presumed as known electromagnetic valve device in NO topology according to the prior art and

6 is a schematic longitudinal sectional view analogous to FIG. 5 of an electromagnetic ROM valve device presumed to be known from the prior art in NC topology according to FIG

State of the art.

The embodiment of Figures 1 -4 illustrates one way to implement the inventive concept; Again, the reference numerals used in FIGS. 1 -4, as far as identical to FIG. 5, FIG. 6, correspond to identical or functionally comparable modules.

Thus, the anchoring means (shown only in the form of the plunger 14) are guided in a surrounding stationary core section 18 which, in turn, is in magnetic flux conduction with a yoke section 19 and a surrounding housing shell 20. A coil winding 16 is held on a (plastic) bobbin 17, which merges integrally in the embodiment shown in a valve housing 26, which is formed inside hollow cylindrical, coaxial with the horizontally extending symmetry or longitudinal axis, frontally for realizing the first fluid port P and shell side for the second (A) and third (T) fluid connection is open. A valve spool assembly 28, loosely seated on the free end of the armature plunger 14, biasing against the direction of movement of the armature means, a compression spring 32 is formed in the right-hand interior of the armature plunger assembly located in the right-hand end of the valve housing 26 on the left hand side of an annular shoulder formed in the interior of the valve spool assembly 33 is supported.

In the right-hand region of the plane of the figure, the valve housing 26 has four channel sections 50 arranged distributed along the inner circumference, which are formed in the plastic material of the valve housing 26, tapering longitudinally in the direction of the anchor means. In this case, an end portion 52 of the valve spool assembly 28 is cylindrically configured so that, in the operating state of FIG. 1 (de-energized coil means 16, thus inserted operating state of the armature means) obstructs the fluid path PA, the channel portion 50 lies in this relative position of the section 52, while the energized operating state of the valve device according to FIG. 4 (extended state of the anchor means, thus moved to the right or shifted position state of the valve slide unit 28), the portion 52, the channel sections 50 opens to the working port A or, so that by the pressure port P and the channel portions 50 to the first fluid port A a (open in the energized state) fluid communication is possible. In parallel, it becomes clear that a shell-side depression 56 provided on the valve slide unit in the middle jacket region influences the fluid flow between A (second fluid connection) and P (third fluid connection): in the operating state of FIG. 1, NC for AP, the communication A- P open, while in the energized state, AP open, the valve spool assembly with a left side cylindrical sealing portion 58, a fluid communication AT blocks (Fig. 4). Termination of the flow causes, by means of the spiral spring 32, a return of the valve slide assembly 28 or the anchor means back into the retracted, retracted operating position of FIG. 1.

It becomes clear that there is no need for a fixed, tensile-loadable connection, for example, between the armature plunger 14 and the valve slide assembly 28; rather, this functionality is effected exclusively by the advancement of the armature unit 14 or the return portion by means of the spring means 32.

In addition, it is advantageously possible by means of this design that by simply exchanging the valve housing 26, the NC topology of the solenoid valve shown in the exemplary embodiment of FIGS. 1-4 can be changed into a NO electromagnetic valve topology constructed analogously to the schematics of FIG. In particular, the basic structure of the electromagnetic actuator remains unchanged, and in addition, it is also possible, in particular, to provide separate assemblies instead of the one-piece construction of coil carrier (17) and valve housing 26 shown in the exemplary embodiment of FIGS the complete actuator housing (which in the exemplary embodiment of FIGS. 1 to 4 provides a plastic encapsulation 21 of the metallic housing assembly 20) can be provided in a modular manner or as a structural unit and then combined with a suitable valve housing technology with a suitable seated valve slide.

Claims

Patent claims

Electromagnetic valve device with

for actuating a valve slide assembly (28) in response to an energization of stationary coil means (16) along an axial direction movable anchor means (12, 14),

which, together with the coil means and stationary core means, are accommodated in an actuator housing (17, 19, 20, 22), preferably as a structural unit and/or module, and assume an inserted and/or retracted armature position (Fig. 1) when the coil means are de-energized ,

wherein the valve slide assembly (28) guided in a valve housing (26) is designed axially at one end for contacting, non-tensile interaction with the anchor means (14) and in such a way that, depending on an axial position of the valve slide assembly, a fluid path from a first fluid connection (P) of the valve housing can be opened or closed to a second fluid connection (A) of the valve housing,

characterized in that

the valve housing (26) has at least one axially fluid-conducting channel section (50) on the inside for cooperation with the valve slide assembly (28) guided therein, in particular at the axial end opposite the anchor means, which is designed so that in the axial position corresponding to the inserted or retracted anchor position Position of the valve slide assembly (Fig. 1) which blocks the fluid path

and in an axial position of the valve slide assembly (Fig. 4) that is moved from the inserted or retracted anchor position, this opens the fluid path via the flow-conducting channel section (50).

Device according to claim 1, characterized in that the fluid-conducting channel section (50) connected to the first fluid connection (P) is profiled and/or closed axially in the direction of the anchor means in such a way that the valve slide assembly (28, 50) blocks the fluid path sits sealingly in the valve housing (26) and when the valve slide assembly is in the moved axial position, it can expose the fluid-conducting channel section (50) to the second fluid connection (A).

Device according to claim 1 or 2, characterized in that the fluid-conducting channel section (50) is designed as a plurality of individual channel sections which are preferably evenly distributed around the inner circumference in a hollow cylindrical region of the valve housing.

Device according to one of claims 1 to 3, characterized in that the first fluid connection (P) on the front side of the valve housing and / or along the axial direction and the second fluid connection (A) on a side housing area, in particular jacket area, of the valve housing (26). It is provided that the fluid-conducting channel section of the valve housing lies in the axial direction between the first and the second fluid connection.

Device according to one of claims 1 to 4, characterized by force storage means (32) which act to reset the valve slide assembly (28) and/or the anchor means (14) into the inserted or retracted anchor position, which are designed in particular as a compression spring.

Device according to claim 5, characterized in that the force storage means are at the front and/or in one of the anchor means opposite axial end region (52) of the valve slide assembly are provided to engage the latter and are preferably supported by a section of the valve housing.

Device according to one of claims 1 to 6, characterized by a third fluid connection (T) provided in the valve housing, which is provided adjacent to the second fluid connection (A) in the direction of the actuator housing (10) and is designed so that the fluid path between the first and the second fluid port blocking axial position of the valve slide assembly, this opens and / or releases a further fluid path from the second to the third fluid port, and which is blocked when the fluid path between the first and the second fluid port is opened.

8. Device according to claim 7, characterized in that the valve device is designed as a 3/2 switching or proportional valve.

Device according to one of claims 1 to 8, characterized in that the electromagnetic valve device is designed to be mountable by axially joining the actuator housing together as a structural unit or module with the valve housing having the valve slide assembly.

Device according to one of claims 1 to 8, characterized in that the valve housing or an assembly of a multi-part valve housing is formed in one piece with a coil support of the stationary coil means. System comprising the electromagnetic valve device according to one of claims 1 to 10 and an additional valve slide assembly designed to be exchanged for the valve slide assembly and / or an additional valve housing designed to be exchanged for the valve housing, which is designed with a further valve slide assembly, so that when the Further valve slide assembly with the anchor means in the anchor housing in the pushed-in or retracted anchor position, a fluid path between the first and the second fluid port can be opened and in the moved axial position of the further valve slide assembly, the fluid path between the first and the second fluid port can be blocked.